Dishwashing machine



March 31, 1931. w. LINDGREN DISHWASHING MACHINE Filed Nov. 19, 1928 3 Sheets-Sheet l I H lllllllllf lm mm '1 March 31, 1931. w, L, UNDGREN 1,798,427

I DISHWASHING MACHINE Filed Nov. 19, 1928 3 Sheets-Sheet 2 March 31, 1931. w UNDGREN 1,798,427

DISHWASHING MACHINE Filed NOV. 19, 1928 5 Sheets-Sheet 3 li J (-9 l a; f; 1 I 41 T w w w" I I 52 1Z 40. 1 I

Patented Mar. 31, 1931 UNITED STATES PATENT oFFIcE] WALDEMAB L. LINDG BEN, OI WA'UKEGAN, ILLINOIS, ASSIGNOR ONE-HALF '10- JOHN E. ERICSSON, OI CHICAGO, ILLINOIS ms'nwasnme months My invention is concerned with portable dish washers of the'type adapted to be placed in a kitchen or fountain sink, when it is needed, and to be disconnected from the water and removed from the .sink when the space it occupies in use is needed. for other purposes.

It is concerned primarily with such a device in which the carrier rotates horizontally upon a vertical axis, thereby roducinga compact and simple structure t at will not have a great deal of weight to be lifted out of the sink.

It is further concerned with such a device that has the spray pipes or members swiveled on the plumblng fixtures, so that when in use they can be swung out at right angles to the back of the sink and into place to spray the water on the carrier, and when it is not in -use, said spray pipes or members can be swungback parallel to the rear wall of the sink and out of the way, so that it can be used as though the dish-washer-spray mechanism was not a part of the sink."

To illustrate my invention, I annex hereto three sheets of drawings, in which the same reference characters are "used to designate identical parts in all the figures, of which- Fig. 1 is a front elevation of my invention as it appears in use, but with a portion of the sink front cut away to show the mechanism otherwise concealed thereby;

Fig. 2 is a top plan view of the same, with a portion of the cover broken away;

of Fig. 1; and 1 p Fig. 9is a detail in section on the line 9-9 of Fig. 8.

I have shown my'invention as applied to a sink 10 having the customary hot and cold water faucets 11 and 12 connected to a-mixer Fig. 3'is a vertical section on the line 3-3 Fig. 8 is a detail in section on the line 88 13 in which is swiveled a nozzle 14 having a cook 15 therein by which the water can be shut off from the nozzle even if theco'cks 11 and 12, or either of them, are open. The nozzle 14, being swiveled, can be turned out at right angles to the rear of the sink for use in the ordinary manner, or can be turned back parallel to said back, as seen in the figures, so as to be out of the way of the dish-washing mechanism when the same is in place.

The dish-washing mechanism preferably consists of a substantial base 16 having a vertical spindle or rod 17 secured in the center thereof, on which is journaled a sleeve 18 which rotates on the spindle 17 and in a cylindrical bearing casing 19 secured on the base bly screws 20. The sleeve 18' has splined t ereonithe worm wheel 21, which is protected in the generally circular casing 22, the

lower half of which forms the top of the casing 19, while the upper half forms the bottom of the continuation 23 of the casing 19, the two halves being suitably secured together, as by screws. Journaled in the casing 22 and secured upon the horizontal shaft 24 is a worm 25 meshing with the worm wheel 21, and on the other end of the shaft 24 is a smaller worm wheel 26, with which meshes the worm 27 secured on the adjacent end of the armature shaft 28 of the small electric motor 29, the casing of which may be a part of the bracket 30 projecting diagonally upward from the base 16. A sheet-metal pan 31, shaped to cover the motor and gearing, is supported by'the pedestal 32 projecting upward from-the motor, and it will be understood that the pan 31 extends beneath the dishwashing mechanism proper so as to receive part of the water falling therefrom and I to deflect the same into the sink clear of the gearing. I

Secured upon the flanged upper end of the sleeve 18 is a wheel or carrier 33 having the numerous small spokes '34 radiating therefrom to the rim 35. These spokes 34 preferably have the small annular grooves 36 formed therein at intervals, so that the wires 37, each making a complete circle, may be looped around the spokes and held in place by thegrooves 36. The numerous substantially-rectangular spaces between the adjacent spokes and the adjacent wires serve to support knives, forks, spoons, etc.,'if they are to be washed, and at the same time permit the free upward passage of the water therethrough. The horizontal carrier wheel 33 is provided with a cylindrical sheet-metal cover 38, the wired lower edge of which extends down substantially to the rim 35, this cover being supported by the disk 39 threaded upon the reduced upper end of the rod 17 and held in place by the nut 40 having the handle portion 41 by which it is screwed in place to hold the cover tightly in place. This cover is provided with the large preferably rectangular aperture 42 at the outer side of the sink, through which the dishes and silverware may be put in place on the carrier and likewise removed when the circuit of the same has been completed. The double worm-wheel reducing gear described serves to rotate the carrier 33 from the motor 29 at a low rate of speed.

The washing of the dishes and silverware is efiected by the soap-containing spraymembers 43 and 44 carried above the casing 38 and below the carrier 33, respectively, the top of the casing being provided with the elongated slot 45, shown only in Fig. 6, which accommodates the tubular spray-member proper 46. The casing 38 preferably has the ribs 47 formed on the sides of the slot 45 to hold the spray member in place, it being understood that the same is brought into place by the springing action of the top of the sheet-metal cover. The tube 46 is perforated on its lower side, and the corresponding tube of the member 44 is perforated on its upper side, so that the water will be sprayed downward through the slot 45 and upward through the various recesses in the wheel or support 33 to supply soapy water to the dishes as they pass between the spray members 43 and 44. On the other side of the center are provided the spray tubes 48 and 49, which are like the spray tubes 46 except that they are not connected with the soap boxes to which the reference numerals 43 and 44 have been applied. I have not herein shown the details of these boxes, as they are the same as shown in my companion application No. 317,176, filed'November 5, 1928.

Referring now to the faucet connections, the cocks 11 and 12 are connected at their rear the preferably flattened pipes 50 and 51 which extend diagonally downward to the left and right, respectively, as seen in Fig. 2 and in dotted lines in Fig. 1, their lower ends being connected at 52 and 53 with the hot and cold water sup lies, respectively. The inlxer 13 has, exten ing downward and substantiallyparallel to the pipes 50 and 51, the pipes 54 and 55, which terminate in the connections 56, which will be seen to have the extension 57 projecting forwardly therefrom and provided with a conical valve-seat 58 for the downwardly-turned valve-like end 59 of the pipe 60, the nut 59 being screwed on the threaded end of the part 58 to hold them in position. The pipes 60 on both sides are the same in design, except that they are turned inwardly toward each other, as seen in the corresponding pipes 60 in Fig. 2, and the rinsing-water pipe 60 terminates in the spray portion 49 previously referred to. The pipe 60 for the soapy water spray terminates in the under side of the soap box marked 44 in Fig. 3.

The connections 56 have screwed into their upper ends the vertical pipes 61, which at their upper ends terminate in somewhat similar connections 62, except that the position of the pipes 6O therein is reversed. The pipe 60 for the clear-water spray-member 48 is lower than the pipe 60 for the soapywater spraying-member which opens into the.

top of the soap box marked 43 in Fig. 3. It will, of course, be understood that with the connections shown, the spraying members can be turned to the position shown in dotted lines in Fig. 2, where they are substantially parallel 'to the rear wall of the sink and are out of the way, so that the sink can be used in the ordinary manner when the conveyor is removed. a

The operation of the apparatus will be readily apparent, as, when the dishes are placed on the conveyor and the motor started, the conveyor will be rotated slowly, bringing the dishes first between the upwardly-directed suds from the member 44 and the downwardly-directed suds from the member 43. The dishes then pass between the clear or rinsing water sprayers 48 and 49, which remove the soap and leave the dishes clean when they arrive at the opening 42, through which they are removed.

WVhile I have shown anddescribed my invention as embodied in the form which I at present consider best adapted to carry out its purposes,it will be understood that it is capable of modifications, and that I do not desire 'to be limited in the interpretation of the following claims except as may be necessitated by the state of the prior art.

What I claim as new, and desire to secure by Letters Patent of the United States, is:

1. In a dish-washer, the combination with a pedestal base adapted to be placed temporarily in a sink, of a rotatable vertical shaft journaled in said base, a skeleton circular carrier secured on the upper end of the shaft, means for rotating said shaft, a perforated spray-member beneath said carrier for throwing water upward therethrough, a similar perforated spraymember above said carrier to throw water downwardly upon articles placed thereon, a hot and cold water mixer, a vertical pipe supported from the rear wall of the sink and connected to the hot and cold water mixer, and horizontal pipes swiveled to the top and bottom of the vertical pipe and having said spray-members connected to the outer ends thereof.

2. In a dish washer, the combination with a pedestal base,-of a rotatable vertical shaft journaled in said base, a skeleton circular carrier secured on the shaft, means for rotating said shaft, a spray member for throwing water through said .carrier, means for supplying water to said spray member, and a stationary cylindrical cover open at its bottom face supported above the carrier and adapted to surround articles thereon, said cover being provided with a feeding aperture on the top face thereof through which dishes can be placed upon and removed from the carrier, and an aperture on the same face on the other side through which the spray member may operate.

3. In a dish washer, the combination with a pedestal base, of a hollow rotatable vertical shaft journaled in said base, a skeleton circular carrier secured on the shaft, a stationary vertical bearing rod secured in the pedestal and upon a lower part of which the hollow shaft is journaled, means for rotating said shaft, a spray member for throwing water through said carrier, means for sup-,

plying water to said spray member, and a stationary cylindrical cover open at its botton face removably supported upon the upper end of the stationary rod and located above the carrier and adapted to.surr0und articles thereon, said cover being provided with a feeding aperture on the. top face thereof through which dishes can be placed upon and removed from the carrier and with an aperture on the same face on the other side through which the spray member may operate.

4. Ina dish washer, the combination with a pedestal base adapted to be placed tem porarily in a sink, of a vertical bearing sleeve having at its center an enlargement for a horizontal Worm gear wheel and for a smaller vertical worm gear wheel and for a wormmeshing with the larger worm gear wheel and secured on the shaft with the smaller worm gear wheel and for a worm secured on the armature shaft of a motor to be specified, said two worm gear wheels, said two worms combined as described, said shaft carrying the worm and the smaller worm gear wheel, a bracket projecting upwardly and outwardly from said pedestal, an electric motor carried on said bracket on the armature shaft of which is secured theaforesaid worm meshing with the smaller worm gear wheel, a rotatable vertical shaft journaled in said bearing sleeve, a skeleton circular carto said spray member, so that water supplied thereto will .be thrown through said carrier and ultimately be discharged therefrom on the bottom of said sink.

' 5. In av dish-washing machine, the combination of a pedestal base adapted'to be placed temporarily in a sink, a sink removably receiving said base, a rotatable vertical shaft journaled in said base, a skelton circular car rier secured upon the upper end of the shaft, an electric motor supported on said -base, gearing from the armature shaft of the motor to the vertical shaft, a spray member extending beneath said carrier for throwing water upward therethrough as it rotates thereover, a similar spray member above said carrier to throw water downwardly upon articles placed therein, said spray members being pivotally mounted in said sink whereby they may be swung adjacent to the rearwall of the sink so as to leave the latter unob structed when the base and carrier are removed, and means for supplying water to said spray members so that water supplied thereto will be thrown through said carrier and ultimately be discharged therefrom on the bottom of the sink. a

In witness whereof, I have hereunto set my hand this 16th day of November, 1928.

WALDEMAR L. LINDGREN. 

